Accounting Policies and Basis of Presentations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Jan. 01, 2019
Supplemental Cash Flow Information
Non-cash acquisition of assets	$ 8
Operating lease ROU assets obtained in exchange for new operating lease liabilities	30
Cash paid for amounts included in the measurement of operating lease liabilities	33
Goodwill and Other Intangible Assets
Intangible assets, net	66
Accumulated amortization	8
Recently issued accounting standards
ROU assets	464
Lease liabilities	504
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	$ 1