CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	$0.01 Par Value Common Stock	Treasury Stock	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Stockholders’ Equity	Noncontrolling Interest
Balance at Dec. 31, 2018	$ 5,731.0	$ 2.0	$ (504.0)	$ 1,368.0	$ 2,463.0	$ (371.0)	$ 2,958.0	$ 2,773.0
Increase (decrease) in equity
Net earnings	552.0	0.0	0.0	0.0	438.0	0.0	438.0	114.0
Less: Net earnings attributable to noncontrolling interest	114.0
Net (loss) earnings attributable to common stockholders	438.0
Other comprehensive loss	(3.0)	0.0	0.0	0.0	0.0	(3.0)	(3.0)	0.0
Purchases of treasury stock	(250.0)	0.0	(250.0)	0.0	0.0	0.0	(250.0)	0.0
Retirement of treasury stock	0.0	0.0	682.0	(90.0)	(592.0)	0.0	0.0	0.0
Acquisition of treasury stock under employee stock plans	(4.0)	0.0	(4.0)	0.0	0.0	0.0	(4.0)	0.0
Issuance of $0.01 par value common stock under employee stock plans	17.0	0.0	2.0	15.0	0.0	0.0	17.0	0.0
Stock-based compensation expense	24.0	0.0	0.0	24.0	0.0	0.0	24.0	0.0
Cash dividends	(200.0)	0.0	0.0	0.0	(200.0)	0.0	(200.0)	0.0
Distributions declared to noncontrolling interest	(186.0)	0.0	0.0	0.0	0.0	0.0	0.0	(186.0)
Balance at Sep. 30, 2019	$ 5,681.0	2.0	(74.0)	1,317.0	2,109.0	(374.0)	2,980.0	2,701.0
Increase (decrease) in equity
Cash dividends ($0.90 per share)	$ 0.90
Balance at Jun. 30, 2019	$ 5,818.0	2.0	(2.0)	1,299.0	2,111.0	(344.0)	3,066.0	2,752.0
Increase (decrease) in equity
Net earnings	114.0	0.0	0.0	0.0	65.0	0.0	65.0	49.0
Less: Net earnings attributable to noncontrolling interest	49.0
Net (loss) earnings attributable to common stockholders	65.0
Other comprehensive loss	(30.0)	0.0	0.0	0.0	0.0	(30.0)	(30.0)	0.0
Purchases of treasury stock	(72.0)	0.0	(72.0)	0.0	0.0	0.0	(72.0)	0.0
Issuance of $0.01 par value common stock under employee stock plans	11.0	0.0	0.0	11.0	0.0	0.0	11.0	0.0
Stock-based compensation expense	7.0	0.0	0.0	7.0	0.0	0.0	7.0	0.0
Cash dividends	(67.0)	0.0	0.0	0.0	(67.0)	0.0	(67.0)	0.0
Distributions declared to noncontrolling interest	(100.0)	0.0	0.0	0.0	0.0	0.0	0.0	(100.0)
Balance at Sep. 30, 2019	$ 5,681.0	2.0	(74.0)	1,317.0	2,109.0	(374.0)	2,980.0	2,701.0
Increase (decrease) in equity
Cash dividends ($0.90 per share)	$ 0.30
Common Stock, Par or Stated Value Per Share	0.01
Common Stock, Par or Stated Value Per Share	$ 0.01
Balance at Dec. 31, 2019	$ 5,637.0	2.0	0.0	1,303.0	1,958.0	(366.0)	2,897.0	2,740.0
Increase (decrease) in equity
Net earnings	313.0	0.0	0.0	0.0	230.0	0.0	230.0	83.0
Less: Net earnings attributable to noncontrolling interest	83.0
Net (loss) earnings attributable to common stockholders	230.0
Other comprehensive loss	(22.0)	0.0	0.0	0.0	0.0	(22.0)	(22.0)	0.0
Purchases of treasury stock	(100.0)	0.0	(100.0)	0.0	0.0	0.0	(100.0)	0.0
Retirement of treasury stock	0.0	0.0	107.0	(17.0)	(90.0)	0.0	0.0	0.0
Acquisition of treasury stock under employee stock plans	(10.0)	0.0	(10.0)	0.0	0.0	0.0	(10.0)	0.0
Issuance of $0.01 par value common stock under employee stock plans	4.0	0.0	2.0	2.0	0.0	0.0	4.0	0.0
Stock-based compensation expense	20.0	0.0	0.0	20.0	0.0	0.0	20.0	0.0
Cash dividends	(193.0)	0.0	0.0	0.0	(193.0)	0.0	(193.0)	0.0
Distributions declared to noncontrolling interest	(174.0)	0.0	0.0	0.0	0.0	0.0	0.0	(174.0)
Balance at Sep. 30, 2020	5,475.0	2.0	(1.0)	1,308.0	1,905.0	(388.0)	2,826.0	2,649.0
Balance at Jun. 30, 2020	5,576.0	2.0	0.0	1,300.0	1,997.0	(426.0)	2,873.0	2,703.0
Increase (decrease) in equity
Net earnings	4.0	0.0	0.0	0.0	(28.0)	0.0	(28.0)	32.0
Less: Net earnings attributable to noncontrolling interest	32.0
Net (loss) earnings attributable to common stockholders	(28.0)
Other comprehensive loss	38.0	0.0	0.0	0.0	0.0	38.0	38.0	0.0
Acquisition of treasury stock under employee stock plans	(1.0)	0.0	(1.0)	0.0	0.0	0.0	(1.0)	0.0
Issuance of $0.01 par value common stock under employee stock plans	1.0	0.0	0.0	1.0	0.0	0.0	1.0	0.0
Stock-based compensation expense	7.0	0.0	0.0	7.0	0.0	0.0	7.0	0.0
Cash dividends	(64.0)	0.0	0.0	0.0	(64.0)	0.0	(64.0)	0.0
Distributions declared to noncontrolling interest	(86.0)	0.0	0.0	0.0	0.0	0.0	0.0	(86.0)
Balance at Sep. 30, 2020	$ 5,475.0	$ 2.0	$ (1.0)	$ 1,308.0	$ 1,905.0	$ (388.0)	$ 2,826.0	$ 2,649.0
Increase (decrease) in equity
Cash dividends ($0.90 per share)	$ 0.30
Common Stock, Par or Stated Value Per Share	$ 0.01