Stockholders' Equity - Schedule of Changes in Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 4,118.0	$ 3,205.0
Comprehensive income
Net earnings	147.0	474.0
Other comprehensive loss	(95.0)	93.0
Comprehensive income	52.0	567.0
Stock issued (repurchased)	(115.0)	(40.0)
Dividends declared	(75.0)	(74.0)
Ending balance	3,980.0	3,719.0
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,870.0	6,933.0
Comprehensive income
Net earnings	152.0	471.0
Comprehensive income	152.0	471.0
Dividends declared	(75.0)	(74.0)
Ending balance	7,947.0	7,391.0
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(2,618.0)	(2,695.0)
Comprehensive income
Other comprehensive loss	(97.0)	93.0
Comprehensive income	(97.0)	93.0
Ending balance	(2,715.0)	(2,602.0)
Treasury Stock/ Additional Paid- in-Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(2,169.0)	(2,059.0)
Comprehensive income
Stock issued (repurchased)	(115.0)	(40.0)
Ending balance	(2,284.0)	(2,099.0)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	112.0	112.0
Comprehensive income
Ending balance	112.0	112.0
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	923.0	914.0
Comprehensive income
Net earnings	(5.0)	3.0
Other comprehensive loss	2.0	0.0
Comprehensive income	(3.0)	3.0
Ending balance	$ 920.0	$ 917.0
Accounting Standards Update 2016-02
Comprehensive income
Cumulative effect of new accounting principle in period of adoption			$ 61.0
Accounting Standards Update 2016-02 \| Retained Earnings
Comprehensive income
Cumulative effect of new accounting principle in period of adoption			$ 61.0

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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