Recent Accounting Pronouncements (Details) - USD ($) $ in Millions	Mar. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets	$ 1,740	$ 1,758	$ 1,117
Other accrued expenses	1,429	1,602	1,470
Other Long-term Liabilities	3,048	3,020	2,515
Retained earnings	$ 19,439	18,700	$ 18,696
Impact of Adopting New Lease Guidance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		641
Other accrued expenses		132
Other Long-term Liabilities		505
Retained earnings		$ 4