Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Period Type:	duration

Shareholders' Equity (Details - Share Repurchases) - USD ($) shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jul. 31, 2019
Repurchases of common stock	$ 95	$ 222	$ 120
Common Stock
Repurchases of common stock, shares	2.0	5.0	2.0
Common Stock \| Current share repurchase program [Member]
Repurchases of stock, authorized amount					$ 1,500
Repurchases of common stock, shares				2.1
Repurchases of common stock				$ 95