Per Share Data (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings per share reconciliation [Abstract]
Net income (loss)	$ 314	$ 1,003	$ 458	$ 1,820
Dividends on redeemable non-controlling interests	$ (1)	$ (1)	$ (3)	$ (3)
Earnings (loss) per share: [Abstract]
Basic (in dollars per share)	$ 0.94	$ 2.70	$ 1.36	$ 4.89
Diluted (in dollars per share)	$ 0.94	$ 2.70	$ 1.36	$ 4.88
Continuing operations [Member]
Earnings per share reconciliation [Abstract]
Net income (loss)	$ 315	$ 1,006	$ 458	$ 1,823
Dividends on redeemable non-controlling interests	(1)	(1)	(3)	(3)
Net (income) loss attributable to participating securities	(1)	(2)	(1)	(3)
Net income (loss) attributable to ordinary shareholders - Basic	313	1,003	454	1,817
Net income (loss) attributable to ordinary shareholders - Diluted	$ 313	$ 1,003	$ 454	$ 1,817
Weighted average number of shares outstanding reconciliation [Abstract]
Basic weighted average common stock outstanding (in shares)	334	370	334	371
Effect of dilutive securities: [Abstract]
Effect of dilutive securities (in shares)	0	0	0	0
Potential dilutive shares (in shares)	334	370	334	371
Earnings (loss) per share: [Abstract]
Basic (in dollars per share)	$ 0.94	$ 2.71	$ 1.36	$ 4.90
Diluted (in dollars per share)	$ 0.94	$ 2.71	$ 1.36	$ 4.89
Discontinued operations [Member]
Earnings per share reconciliation [Abstract]
Net income (loss)	$ (1)	$ (3)	$ 0	$ (3)
Dividends on redeemable non-controlling interests	0	0	0	0
Net (income) loss attributable to participating securities	0	0	0	0
Net income (loss) attributable to ordinary shareholders - Basic	(1)	(3)	0	(3)
Net income (loss) attributable to ordinary shareholders - Diluted	$ (1)	$ (3)	$ 0	$ (3)
Weighted average number of shares outstanding reconciliation [Abstract]
Basic weighted average common stock outstanding (in shares)	334	370	334	371
Effect of dilutive securities: [Abstract]
Effect of dilutive securities (in shares)	0	0	0	0
Potential dilutive shares (in shares)	334	370	334	371
Earnings (loss) per share: [Abstract]
Basic (in dollars per share)	$ 0	$ (0.01)	$ 0	$ (0.01)
Diluted (in dollars per share)	$ 0	$ (0.01)	$ 0	$ (0.01)