Major Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Loss Contingencies [Line Items]

Provision for specific environmental sites

As at December 31, 2020, 2019 and 2018, the Company's provision for specific environmental sites was as follows:

In millions	2020		2019		2018
Beginning of year	$	57	$	61	$	78
Accruals and other	44		31		16
Payments	(42)		(34)		(34)
Foreign exchange	—		(1)		1
End of year	$	59	$	57	$	61
Current portion - End of year	$	46	$	38	$	39

Employee injuries, Canada [Member]

Loss Contingencies [Line Items]

Provision for personal injury and other claims

As at December 31, 2020, 2019 and 2018, the Company's provision for personal injury and other claims in Canada was as follows:

In millions	2020		2019		2018
Beginning of year	$	207	$	207	$	183
Accruals and other	31		29		52
Payments	(32)		(29)		(28)
End of year	$	206	$	207	$	207
Current portion - End of year	$	68	$	55	$	60

Employee injuries, United States [Member]

Loss Contingencies [Line Items]

Provision for personal injury and other claims

As at December 31, 2020, 2019 and 2018, the Company's provision for personal injury and other claims in the U.S. was as follows:

In millions	2020		2019		2018
Beginning of year	$	145	$	139	$	116
Accruals and other	28		44		41
Payments	(29)		(31)		(28)
Foreign exchange	(3)		(7)		10
End of year	$	141	$	145	$	139
Current portion - End of year	$	41	$	36	$	37