CONDENSED CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) shares in Millions, $ in Millions | Total | Preferred Stock | Common StockClass A Common Stock | Additional Paid-in Capital | (Accumulated Deficit) | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Total Coty Inc. Stockholders’ Equity | Noncontrolling Interests | As Previously Reported | As Previously ReportedPreferred Stock | As Previously ReportedCommon StockClass A Common Stock | As Previously ReportedAdditional Paid-in Capital | As Previously Reported(Accumulated Deficit) | As Previously ReportedAccumulated Other Comprehensive Income (Loss) | As Previously ReportedTreasury Stock | As Previously ReportedTotal Coty Inc. Stockholders’ Equity | As Previously ReportedNoncontrolling Interests | As Adjusted | As AdjustedPreferred Stock | As AdjustedCommon StockClass A Common Stock | As AdjustedAdditional Paid-in Capital | As Adjusted(Accumulated Deficit) | As AdjustedAccumulated Other Comprehensive Income (Loss) | As AdjustedTreasury Stock | As AdjustedTotal Coty Inc. Stockholders’ Equity | As AdjustedNoncontrolling Interests |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment due to the adoption of ASU | Accounting Standards Update 2016-09 | $ 8.3 | | | | $ 8.3 | | | $ 8.3 | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period (in shares) at Jun. 30, 2017 | | 4.2 | 812.9 | | | | 65 | | | | 4.2 | 812.9 | | | | 65 | | | | | | | | | | | |
Balance, beginning of period at Jun. 30, 2017 | 9,326 | $ 0 | $ 8.1 | $ 11,203.2 | (450.9) | $ 4.4 | $ (1,441.8) | 9,323 | $ 3 | $ 9,317.7 | $ 0 | $ 8.1 | $ 11,203.2 | $ (459.2) | $ 4.4 | $ (1,441.8) | $ 9,314.7 | $ 3 | | | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units (in shares) | | | 1.5 | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units | 11.2 | | $ 0 | 11.2 | | | | 11.2 | | | | | | | | | | | | | | | | | | | |
Shares withheld for employee taxes | (3.1) | | | (3.1) | | | | (3.1) | | | | | | | | | | | | | | | | | | | |
Share-based compensation expense | 8.1 | | | 8.1 | | | | 8.1 | | | | | | | | | | | | | | | | | | | |
Dividends ($0.125 per Common Share) | (94.3) | | | (94.3) | | | | (94.3) | | | | | | | | | | | | | | | | | | | |
Net income (loss) | (21.9) | | | | (19.7) | | | (19.7) | (2.2) | | | | | | | | | | | | | | | | | | |
Other comprehensive loss | 239.7 | | | | | 239.1 | | 239.1 | 0.6 | | | | | | | | | | | | | | | | | | |
Distribution of redeemable noncontrolling interest due to additional contribution | 17 | | | 17 | | | | 17 | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | (29) | | | (29) | | | | (29) | | | | | | | | | | | | | | | | | | | |
Balance, end of period (in shares) at Sep. 30, 2017 | | 4.2 | 814.4 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Sep. 30, 2017 | 9,453.7 | $ 0 | $ 8.1 | 11,113.1 | (470.6) | 243.5 | $ (1,441.8) | 9,452.3 | 1.4 | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Jun. 30, 2017 | 551.1 | | | | | | | | | 551.1 | | | | | | | | | | | | | | | | | |
Redeemable Noncontrolling Interests | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Net income (loss) | 5.8 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Distribution to noncontrolling interests, net | (6.4) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dilution of redeemable noncontrolling interest due to additional contribution | (17) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | 29 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Sep. 30, 2017 | 562.5 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period (in shares) at Jun. 30, 2017 | | 4.2 | 812.9 | | | | 65 | | | | 4.2 | 812.9 | | | | 65 | | | | | | | | | | | |
Balance, beginning of period at Jun. 30, 2017 | 9,326 | $ 0 | $ 8.1 | 11,203.2 | (450.9) | 4.4 | $ (1,441.8) | 9,323 | 3 | 9,317.7 | $ 0 | $ 8.1 | 11,203.2 | (459.2) | 4.4 | $ (1,441.8) | 9,314.7 | 3 | | | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Other comprehensive loss | 280 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period (in shares) at Dec. 31, 2017 | | 5.2 | 814.8 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2017 | 9,428.5 | $ 0 | $ 8.1 | 10,940.3 | (361.4) | 283.9 | $ (1,441.8) | 9,429.1 | (0.6) | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Jun. 30, 2017 | 551.1 | | | | | | | | | 551.1 | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2017 | 638.3 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period (in shares) at Sep. 30, 2017 | | 4.2 | 814.4 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Sep. 30, 2017 | 9,453.7 | $ 0 | $ 8.1 | 11,113.1 | (470.6) | 243.5 | $ (1,441.8) | 9,452.3 | 1.4 | | | | | | | | | | | | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Issuance of Preferred Stock (in shares) | | 1 | | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units (in shares) | | | 0.4 | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units | 2.5 | | | 2.5 | | | | 2.5 | | | | | | | | | | | | | | | | | | | |
Shares withheld for employee taxes | (0.3) | | | (0.3) | | | | (0.3) | | | | | | | | | | | | | | | | | | | |
Share-based compensation expense | 9 | | | 9 | | | | 9 | | | | | | | | | | | | | | | | | | | |
Dividends ($0.125 per Common Share) | (94.4) | | | (94.4) | | | | (94.4) | | | | | | | | | | | | | | | | | | | |
Net income (loss) | 107.3 | | | | 109.2 | | | 109.2 | (1.9) | | | | | | | | | | | | | | | | | | |
Other comprehensive loss | 40.3 | | | | | 40.4 | | 40.4 | (0.1) | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants (See Note 17) | (8.3) | | | (8.3) | | | | (8.3) | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | (81.3) | | | (81.3) | | | | (81.3) | | | | | | | | | | | | | | | | | | | |
Balance, end of period (in shares) at Dec. 31, 2017 | | 5.2 | 814.8 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2017 | 9,428.5 | $ 0 | $ 8.1 | 10,940.3 | (361.4) | 283.9 | $ (1,441.8) | 9,429.1 | (0.6) | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Sep. 30, 2017 | 562.5 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Redeemable Noncontrolling Interests | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Net income (loss) | 11.3 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Distribution to noncontrolling interests, net | (25.3) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants | 8.3 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Proceeds from noncontrolling interests | 0.2 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | 81.3 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2017 | 638.3 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment due to the adoption of ASU | Accounting Standards Update 2016-16 | | | | | | | | | | | | | | | | | | | $ (112.6) | | | | $ (112.6) | | | $ (112.6) | |
Adjustment due to the adoption of ASU | Accounting Standards Update 2014-09 | | | | | | | | | | | | | | | | | | | (18.2) | | | | (18.2) | | | (18.2) | |
Balance, beginning of period (in shares) at Jun. 30, 2018 | | | | | | | | | | | 5 | 815.8 | | | | 65 | | | | 5 | 815.8 | | | | 65 | | |
Balance, beginning of period at Jun. 30, 2018 | 8,855.2 | | | | | 158.8 | | | | 8,855.2 | $ 0 | $ 8.1 | 10,750.8 | (626.2) | 158.8 | $ (1,441.8) | 8,849.7 | 5.5 | 8,724.4 | $ 0 | $ 8.1 | $ 10,750.8 | (757) | $ 158.8 | $ (1,441.8) | 8,718.9 | $ 5.5 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units (in shares) | | | 0 | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units | 0.7 | | $ 0 | 0.7 | | | | 0.7 | | | | | | | | | | | | | | | | | | | |
Share-based compensation expense | 6.4 | | | 6.4 | | | | 6.4 | | | | | | | | | | | | | | | | | | | |
Dividends ($0.125 per Common Share) | (94) | | | (94) | | | | (94) | | | | | | | | | | | | | | | | | | | |
Net income (loss) | (10.9) | | | | (12.1) | | | (12.1) | 1.2 | | | | | | | | | | | | | | | | | | |
Other comprehensive loss | (47.8) | | | | | (48) | | (48) | 0.2 | | | | | | | | | | | | | | | | | | |
Distribution to noncontrolling interests, net | (1.3) | | | | | | | | (1.3) | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants (See Note 17) | (1.6) | | | (1.6) | | | | (1.6) | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | 37.2 | | | 37.2 | | | | 37.2 | | | | | | | | | | | | | | | | | | | |
Balance, end of period (in shares) at Sep. 30, 2018 | | 5 | 815.8 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Sep. 30, 2018 | 8,613.1 | $ 0 | $ 8.1 | 10,699.5 | (769.1) | 110.8 | $ (1,441.8) | 8,607.5 | 5.6 | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Jun. 30, 2018 | | | | | | | | | | 661.3 | | | | | | | | | 661.3 | | | | | | | | |
Redeemable Noncontrolling Interests | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Net income (loss) | 0.8 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Distribution to noncontrolling interests, net | (4.3) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants | 1.6 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | (37.2) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Sep. 30, 2018 | 622.2 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period (in shares) at Jun. 30, 2018 | | | | | | | | | | | 5 | 815.8 | | | | 65 | | | | 5 | 815.8 | | | | 65 | | |
Balance, beginning of period at Jun. 30, 2018 | 8,855.2 | | | | | 158.8 | | | | 8,855.2 | $ 0 | $ 8.1 | $ 10,750.8 | $ (626.2) | $ 158.8 | $ (1,441.8) | $ 8,849.7 | $ 5.5 | 8,724.4 | $ 0 | $ 8.1 | $ 10,750.8 | $ (757) | $ 158.8 | $ (1,441.8) | $ 8,718.9 | $ 5.5 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends ($0.125 per Common Share) | | | | (188.4) | | | | | | | | | | | | | | | | | | | | | | | |
Other comprehensive loss | (125) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants (See Note 17) | | | | (1.6) | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period (in shares) at Dec. 31, 2018 | | 1.9 | 816.2 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2018 | 7,611.3 | $ 0 | $ 8.1 | 10,734.9 | (1,729.7) | 33.6 | $ (1,441.8) | 7,605.1 | 6.2 | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Jun. 30, 2018 | | | | | | | | | | $ 661.3 | | | | | | | | | $ 661.3 | | | | | | | | |
Redeemable Noncontrolling Interests | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants | 1.6 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2018 | 487.6 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period (in shares) at Sep. 30, 2018 | | 5 | 815.8 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Sep. 30, 2018 | 8,613.1 | $ 0 | $ 8.1 | 10,699.5 | (769.1) | 110.8 | $ (1,441.8) | 8,607.5 | 5.6 | | | | | | | | | | | | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Cancellation of preferred stock (in shares) | | (3.1) | | | | | | | | | | | | | | | | | | | | | | | | | |
Stock cancelled during period, amount | | $ 0 | | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units (in shares) | | | 0.4 | | | | | | | | | | | | | | | | | | | | | | | | |
Exercise of employee stock options and restricted stock units | 0.2 | | $ 0 | 0.2 | | | | 0.2 | | | | | | | | | | | | | | | | | | | |
Shares withheld for employee taxes | (1.3) | | | (1.3) | | | | (1.3) | | | | | | | | | | | | | | | | | | | |
Share-based compensation expense | 4.4 | | | 4.4 | | | | 4.4 | | | | | | | | | | | | | | | | | | | |
Dividends ($0.125 per Common Share) | (94.6) | | | (94.6) | | | | (94.6) | | | | | | | | | | | | | | | | | | | |
Net income (loss) | (960) | | | | (960.6) | | | (960.6) | 0.6 | | | | | | | | | | | | | | | | | | |
Other comprehensive loss | (77.2) | | | | | (77.2) | | (77.2) | | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants (See Note 17) | | | | (1.6) | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | 126.7 | | | 126.7 | | | | 126.7 | | | | | | | | | | | | | | | | | | | |
Balance, end of period (in shares) at Dec. 31, 2018 | | 1.9 | 816.2 | | | | 65 | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2018 | 7,611.3 | $ 0 | $ 8.1 | $ 10,734.9 | $ (1,729.7) | $ 33.6 | $ (1,441.8) | $ 7,605.1 | $ 6.2 | | | | | | | | | | | | | | | | | | |
Balance, beginning of period at Sep. 30, 2018 | 622.2 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Redeemable Noncontrolling Interests | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Net income (loss) | 4 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Distribution to noncontrolling interests, net | (11.9) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Additional redeemable noncontrolling interests due to employee grants | 1.6 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Adjustment of redeemable noncontrolling interests to redemption value | (126.7) | | | | | | | | | | | | | | | | | | | | | | | | | | |
Balance, end of period at Dec. 31, 2018 | $ 487.6 | | | | | | | | | | | | | | | | | | | | | | | | | | |