Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Summary of outstanding debt

The following is a summary of outstanding debt (in millions):

As of December 31	2017		2016
3.875% Senior Notes due December 2025	$	745	$	744
5.00% Senior Notes due September 2020	598		598
3.50% Senior Notes due June 2024	595		594
4.75% Senior Notes due May 2045	592		592
2.875% Senior Notes due May 2026 (EUR 500M)	587		516
4.60% Senior Notes due June 2044	544		543
8.205% Junior Subordinated Notes due January 2027	521		521
2.80% Senior Notes due March 2021	398		397
4.00% Senior Notes due November 2023	348		347
6.25% Senior Notes due September 2040	296		295
4.76% Senior Notes due March 2018 (CAD 375M)	296		277
4.45% Senior Notes due May 2043	246		246
4.25% Senior Notes due December 2042	197		197
Commercial paper	—		329
Other	3		9
Total debt	5,966		6,205
Less: Short-term and current portion of long-term debt	299		336
Total long-term debt	$	5,667	$	5,869

Repayments of long-term debt

Repayments of total debt are as follows (in millions):

2018	$	299
2019	—
2020	600
2021	400
2022	—
Thereafter	4,770
Total Repayments	6,069
Unamortized discount, premium, and debt issuance cost	(103		)
Total Debt	$	5,966

Schedule of Commercial Paper

The weighted average commercial paper outstanding and its related interest rates are as follows:

Years ended December 31	2017			2016
Weighted average commercial paper outstanding	$	170		$	265
Weighted average interest rate of commercial paper outstanding	0.18		%	0.22		%

Commercial paper outstanding, which is included in Short-term debt and current portion of long-term debt in the Company’s Consolidated Statements of Financial Position, is as follows (in millions):

As of	December 31, 2017		December 31, 2016
Commercial paper outstanding	$	—	$	329