Shareholders' Equity - Noncontrolling Interests (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Noncontrolling interests	$ 312	$ 306

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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