Income taxes

3 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Income taxes

Income taxes

The effective income tax rate including discrete items for the three months ended March 31, 2025 was 24.32%, compared to 25.09% for the same period of 2024.

For the three months ended March 31, 2025, the effective income tax rate was 24.50%, excluding the discrete items of amortization of business acquisition fair value adjustments of $94 million, and acquisition-related costs incurred by the Company of $20 million.

For the three months ended March 31, 2024, the effective income tax rate was 25.00%, excluding the discrete items of amortization of business acquisition fair value adjustments of $86 million, acquisition-related costs incurred by CPKC of $26 million, and adjustments to provisions for Mexican taxes of $10 million recognized in "Compensation and benefits".

Mexican Tax Settlements

During the three months ended March 31, 2025, the company received final audit letters for Kansas City Southern de México, S.A. de C.V. (also known as Canadian Pacific Kansas City Mexico) ("CPKCM") for 2021 and a payment of $11 million was made in respect of that year.

2014 Tax Assessment

CPKCM's 2014 Tax Assessment is currently in litigation before the Federal Collegiate Circuit Courts (see Note 13).