Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2018

Marketable Securities.

Schedule of marketable securities

(Millions)	September 30, 2018		December 31, 2017
Corporate debt securities	$	—	$	14
Commercial paper		304		899
Certificates of deposit/time deposits		31		76
U.S. municipal securities		3		3
Asset-backed securities:
Automobile loan related		—		16
Credit card related		—		68
Asset-backed securities total		—		84
Current marketable securities	$	338	$	1,076
U.S. municipal securities	$	27	$	27
Non-current marketable securities	$	27	$	27
Total marketable securities	$	365	$	1,103

Marketable securities by contractual maturity

(Millions)	September 30, 2018
Due in one year or less	$	338
Due after one year through five years		13
Due after five years through ten years		14
Total marketable securities	$	365