Supplemental Balance Sheet Information (Details 2) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Cash and cash equivalents as presented in Condensed Consolidated Balance Sheets		$ 278	$ 292
Property, plant and equipment, gross		2,338	2,353
Accumulated depreciation and amortization		(1,126)	(1,116)
Property, plant and equipment, net		1,212	1,237
Cash, Cash Equivalents and Restricted Cash as presented in the Consolidated Statement of Cash Flows		474	474	$ 1,083	$ 1,668
Prepaid expenses and other current assets [Member]
Restricted Cash and Cash Equivalents	[1]	170	151
Assets held for sale		24	0
Other Current Assets [Member]
Restricted Cash and Cash Equivalents	[2]	$ 26	$ 31

[1] Restricted cash within Prepaid expenses and other current assets reflects the cash related to advertising cooperatives that we consolidate that can only be used to settle obligations of the respective cooperatives and Taco Bell Securitization interest reserves.

[2] Primarily trust accounts related to our self-insurance program.