STOCKHOLDERS' EQUITY - Restricted Stock Unit Awards and Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 30, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Weighted Average Exercise Price
Outstanding beginning of period (in dollars per share)		$ 25.01	$ 23.87	$ 37.60
Options exercised (in dollars per share)		25.01	12.70	60.85
Options forfeited (in dollars per share)			2.74	35.56
Balance at end of period (in dollars per share)			25.01	23.87
Dividends
Common Stock dividends and dividend equivalent rights declared (in dollars per share)	$ 0.63	$ 0.63	$ 0.57	$ 0.52
Dividends declared		$ 127.1	$ 125.9	$ 116.4
Dividends paid		127.4	125.2	115.5
Dividend equivalents accrued but not yet paid		$ 1.2	$ 0.7	$ 0.9
Restricted stock units
Fair Value Assumptions
Price correlation		(0.55%)
Expected volatility		29.20%
Risk-free interest rate		2.50%
Risk-free interest rate time period		2 years
Number of Shares
Balance at the beginning of the period (in shares)		796,912	807,810	776,697
Shares granted (in shares)		704,235	429,759	436,534
Shares vested (in shares)		(441,503)	(319,503)	(285,652)
Shares forfeited (in shares)		(546,512)	(121,154)	(119,769)
Balance at the end of the period (in shares)		513,132	796,912	807,810
Outstanding and Expected to Vest (in shares)		271,685
Weighted Average Fair Value
Balance at the beginning of the period (in dollars per share)		$ 218.81	$ 207.45	$ 216.89
Shares granted (in dollars per share)		161.05	233.98	229.37
Shares vested (in dollars per share)		218.45	224.62	248.70
Shares forfeited (in dollars per share)		188.40	227.66	211.69
Balance at the end of the period (in dollars per share)		172.06	$ 218.81	$ 207.45
Outstanding and Expected to Vest (in dollars per share)		$ 200.63
Restricted stock, additional disclosures
Total fair value of units vested		$ 96.4	$ 71.8	$ 71.0
Aggregate intrinsic value of units outstanding and expected to vest		$ 30.5
Weighted-average remaining contractual life		1 year 3 months 18 days
Market-based restricted stock unit awards
Number of Shares
Balance at the beginning of the period (in shares)		56,229	28,172
Shares granted (in shares)		37,878	28,057	28,172
Shares forfeited (in shares)		(69,819)
Balance at the end of the period (in shares)		24,288	56,229	28,172
Performance-based restricted stock unit awards
Number of Shares
Balance at the beginning of the period (in shares)		423,242	450,579	444,319
Shares granted (in shares)		420,239	263,542	282,311
Shares vested (in shares)		(262,773)	(188,680)	(188,929)
Shares forfeited (in shares)		(350,436)	(102,199)	(87,122)
Balance at the end of the period (in shares)		230,272	423,242	450,579
Stock Compensation Plans, Additional Disclosures
Award vesting period		3 years
Service-based restricted stock unit awards
Number of Shares
Balance at the beginning of the period (in shares)		317,441	329,059	332,378
Shares granted (in shares)		246,118	138,160	126,051
Shares vested (in shares)		(178,730)	(130,823)	(96,723)
Shares forfeited (in shares)		(126,257)	(18,955)	(32,647)
Balance at the end of the period (in shares)		258,572	317,441	329,059
Stock Compensation Plans, Additional Disclosures
Award vesting period		3 years
Employee Stock Options
Stock Compensation Plans, Additional Disclosures
Award vesting period		3 years
Expiration period for awards granted		10 years
Stock option activity
Balance at the beginning of the period (in shares)		10,854	11,859	18,866
Options exercised (in shares)		(10,854)	(886)	(7,004)
Options forfeited (in shares)			(119)	(3)
Balance at the end of the period (in shares)			10,854	11,859
Exercisable, Options (in shares)			10,854	11,859	18,864
Weighted Average Exercise Price
Exercisable (in dollars per share)			$ 25.01	$ 23.87	$ 37.60
Stock options activity, additional disclosures
Total intrinsic value of stock options exercised		$ 1.3	$ 0.2	$ 1.2
Cash proceeds from stock options exercised		$ 0.3