Accounting Policies and Basis of Presentations (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 28, 2019	Jan. 01, 2019
Supplemental Cash Flow Information
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 62
Finance lease ROU assets obtained in exchange for new finance lease liabilities	31
Cash paid for amounts included in the measurement of operating lease liabilities	101
Cash paid for amounts included in the measurement of finance lease liabilities	2
Goodwill and Other Intangible Assets
Intangible assets, net	62
Accumulated amortization	13
Recently issued accounting standards
ROU assets	443
Lease liabilities	479
ASU 2016-02
Recently issued accounting standards
ROU assets		$ 460
Lease liabilities		$ 498
CT&M
Goodwill and Other Intangible Assets
Change in carrying amount of goodwill	$ 2