Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents [Table Text Block]

The following table reconciles cash, cash equivalents and restricted cash reported in our consolidated balance sheets to the total amount presented in our consolidated statements of cash flows:

	December 31,
	2019		2018
	(in millions)
Cash and cash equivalents	$	3,315	$	2,443
Restricted cash and cash equivalents	779		259
Restricted cash included within long-term investments and other assets	3		3
Total cash, cash equivalents and restricted cash and cash equivalents in the consolidated statement of cash flow	$	4,097	$	2,705