Consolidated Statements of Shareholders' Equity (Parentheticals) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018		Dec. 31, 2017
Treasury shares held in trust (in shares)	1		1			1
Treasury shares held in trust	$ 29		$ 29			$ 31
Common stock	17		17			$ 17
Adoption of new accounting standards		$ (178)		$ 13	[1]
Decrease to accumulated other comprehensive income	(1,019)		(102)
Increase to retained earnings	$ 45,108	$ 41,089	$ 40,911
Accounting Standards Update 2014-09
Adoption of new accounting standards				13
Accounting Standards Update 2018-02
Decrease to accumulated other comprehensive income				7
Increase to retained earnings				$ 7

[1] Reflects the adoption of Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers, which resulted in a reduction to retained earnings of $13 million and the adoption of ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which resulted in a reduction to accumulated other comprehensive income of $7 million and an increase to retained earnings of $7 million, each during the year ended December 31, 2018.